Here are certain types of design standards of PCB Design for your reference:
TS—S0902010001 (Information technology equipment design specification of PCB safety regulations)
TS—SOE0199001?(Electronic device design standard of forced air cooling and heating)
TS—SOE0199002?(Electronic device design standard of natural air cooling and heating )
IEC60194 (Printed Circuit Board design manufacture?and assembly-terms?and?definitions)